Telegraphic apparatus for the automatic reception and retransmission of electric signals



TION V 4 sheets sheec 1 CREED OR THE AUTOMATIC RECEP N' OF ELECTRIC SIGNALS TELEGRAPHIC APPARATU Filed April 12, 1924 AND RETRANSMISSIO April 27-, ma,

1,582,578 TOMATIC RECEPTION ELECTRIC SIGNALS v A ril 27,*11926,

. F e CREE- TELEGRAPHIVC APPARATUS FOR THE AND RETRANSMISSION OF v 4 Sheets-Sheet 2 "Filed April 12, 1924 A ril-27 1926.; v 1,582,578

F. e; CREED TELEGRAPHIOAPPARATUS FOR THE AUTOMATIC RECEPTION AND RETRANSMISSION OF ELECTRIC SIGNALS Filed April'-12,'l924 '4 Sheets-Sheet 4 a D I Patented pr. 2?, teen,

cow p U, iaeaaaa FFHQEG FREDERIQK. GEORGE QREED, F CROYDON, ENGLAND.

OF ELECTRIC SIGNALS.

Application filed April 12, 1924. Serial No. 706,023.

To all whom it may concern:-

Be it known that I, FREDERICK GEORGE CILEED, a subject of the King of Great Brit- .aiu and Ireland, residing at Croydon, in the county of Surrey, England, have invented Improvements in or Relating to Telegraphic Apparatus for the Automatic Reception and Retransmission of Electric Signals, of which thefollowing is a specification.

. tion the pin wheel) place,

corresponding signals to This invention has reference to that type of telegraphic apparatus for the automaticr'eception and retransmission of electric .sig-

nals, Whereinthefsignals received byone line or section of a line are caused to'disin an endways direction, successive parallel pins or equivalentdevices that are carried by a movable member and caused to move in-anendles's path, such pins, according to their endways position, enabling be re-transinitted over a second line orv section of line, each of thepins, after being displaced by the action of a signal and utilized for transmitting thesignal to the second lineor section of line,

being restored to its original position for reuse. I I sometimes been earned by an endless chain In such apparatus the pins vhave and sometimes by a rotary wheel.

'Now the present invention-has reference to improvements in telegraph apparatus of the type referred to and it has for its object to simplify the construction'and oper ationof such apparatus and to enable the apparatus automatically to compensate for any distortion of the received signals in such a manner that the signals can be re-transmitted or repeatedin as steady and regular a manner as can be done with a standard \Vheatstone transmitter or other transmitter pins (hereinafter called signal pins) moved of the lVheatstone type.

' To this end, the endways movable parallel pins are caused to move in an endless path y a wheel (hereinafter called for distincdriven through a friction clutch from" a shaft that is caused to rotate as nearly aspossible'at a predetermined rateand the position of which wheel in a rotary sense, to compensate for distorted. signal iscapable of being adjusted by one or more correcting Wheels connected to the pin Wheel and adapted to be operated, when this-may be necessary, by one or more correcting devices usuallyin the form of a rod or rods. .The pins are each moved laterally in one direction by one or other .of two arm a of receiving apparatus for perforating tape in accordance with the signals received, being. replaced'by devices, such as levers, adapted to act astappers, or by a single tapper for moving the pins endways in therequired direction, in accordance with the received signals. The correcting wheel or wheels-and correcting device or devices areor may be similar to the correspondingly named parts used in the said former apparatus, whils't the v pin wheel corresponds to the tape feed wheel of such apparatus. Telegraph receiving apparatus of the kind describedvin the specifications of the said former Letters Patent is well known as a Creed receiver and will hereinafter for brevity, be so called. r

' There-transmitting portion of the apparatus according to the present invention 7 comprises two circuit controlling levers (hereinafter called for brevity anddistinction A and B) each having an arm or part, (hereinaftcr'called for brevity and distinction, arm a or 1)) adapted to'be moved by spring-pressure in a directiontowards the endways by the; tappers controlled by received electric signals, and means for posi-= tively moving each of the said levers A and B with arms a and b in the opposite direction'against the action of the springs. The

wards-the signal pins moved by the tapper that is under the control of signals, due say to a positive or marking current, and the arm I) of lever B is adapted to be moved to- ,vhrds the signal pins that are moved by the tapper that is under the control of signals due to a negative or spacing current. The arrangement is such that when a signal pin is moved endways by one tapper, under lever'A is adapted to be moved tooperating means,

the control of a positive current, so as to move its corresponding end out of the path of the adjacent arm a ofthe corresponding lever A, such arm, when relieved of the action of its positive operating means, will bemoved by its spring across the path of the said pin to a sufiicient extent to enable the lever A to close a circuit for transmitting a positive current to the second line or section of line and when the other tapper moves a signal pin endways, under the action of a negative current, so as to move its corresponding end out of the path of the adjacent arm I) of the second lever B, such arm, when relieved of the action of its positive will'be moved by its spring across the path of the corresponding signal pin to a sulficient extent to enable the said second lever to close a circuit for transmitting a negative current to the said second line or section of line. circuit controlling levers A and B is similar .to that of the rocking bell crank levers in a standard W'heatstone transmitter for sending from a local battery positive and negative signals, and the function of the arms a and 6 thereof, that move across the path of the signal pins, is similar to that of the peckers in a WVheatstone transmitter, the absauce or presence of pin ends in the path of the lever arms, corresponding to the absence or presence of perforations in a VVheatstone- Morse or other perforated tape passing through a Wheatstone transmitter. The alternate movements of the levers A and B therefore act to send positive and negative currents to the second line or section of line.

Automatic receiving and re-transmitting apparatus embodying the invention can be variously constructed.

In the accompanying illustrative drawings, Figs. 1 and 2 show respectively in side elevation and plan, one construction of telegraph apparatus according to the invention, suitable for the automatic reception and retransmission of \Vheatstone-Morse electric signals. Fig. 3 shows the apparatus partly in side elevation and partly in longitudinal section on the line IIIIII of Fig. 2. Fig. 4 is a cross section on the line IV-IV of Fig. 1 and Fig. 5 is a cross section on the line VV of Fig. 8. Fig. 6 is a perspective view of pin restoring cams. Figs. 7 and 8 show respectively in side elevation and plan, part of.a pin chain according to the invention, suitable for the reception and retransmission of Vheatstone-Morse or cable,

code signals, part ofthe chain shown in Fig. 7 being in longitudinal section on the line VII-VII of Fig. 8. Fig. 9 is a cross section on the line IX-IX of Fig. 7, Fig. 10 is a similar view to Fig. 9 but showing the pins in a different position. Fig. 11 shows one of the links of the chain in longitudinal section. Fig. 12 is a detail View to The function of the.

a larger scale than Figs. 1, 2 and 3. Fig. 13 shows in side elevation and Fig. 14 in cross section on the line XIV-XIV of Fig. 13, part .of a modified construction of pin chain suitable for use in Vheatstone-Morse, or cable code working. Figs. 15, 16 and 17 show part of the said pin chain in plan with the signal pins in three different positions in the three figures. Fig. 18 is a similar view to Fig. 5 but shows a modified arrangement. Figs. 19 and 20 show in plan, part of a chain like that shown in Figs. 13 and 14 adapted for use when working according to the five unit or other multiple unit code. Fig. 21 shows partly in plan and partly in horizontal section, means for moving the signal pins shown in Figs. 7 to 11 inclusive and in Figs. 13 to 17 inclusive, endways in their chain in accordance with received signals transmitted according to the cable code.

According to the arrangement shown in Figs. 1 to 12, in which two sets of signal pins or and 7) are carried by an endless chain c, the chain passes around and is driven by a toothed wheel (Z (herein called the )in wheel) fixed on a spindle e driven through a friction clutch and worm gearing at 7 from a main driving shaft 9 forming part of a Creed receiver, the chain also passing around a toothed wheel lt'fixed on a spindle 2' forming part of the re-transmitting apparatus and driven from the saidmain driving shaft 9 through .worm gearing at 7'. The endless chain 0 comprises a number of links 0 of loop shape as seen in plan (Fig. 8) and of L shape as seen in side elevation (Fig. 7), the two free ends of each link being inset at 0 so that they can enterand connected ends of the next link in the chain (see Figs. 8 and 9). For apparatus such as is now being described, suitable for tho lVheat'stone-Morse code, the side portions of each link, constituting the vertical arm of the link, ha's-two sets of superposed holes for the reception of two horizontal signal pins a and b and the side portions of each link, constituting the horizontal arm of the link, are formed with one set of holes 0 The links are jointed together to form an endless chain by the. lower signal pin Z) of each pair of signal pins a and Z1, passing through the lower hole in the vertical arm of one link 0 and through the holes 0 in the horizontal arm of the next link, the lowei portion of the end connecting member be tween the two side portions of each link be ing cut away as shown at c (Fig. 11), to admit of the passage therethrough of the horizontal arm of the adjacent link. The chain thus comprises a number of small L shaped links 0 carrying a number of pairs of superposed signal pins (4 and Z), each of the pins being free to move endways in its link. The two signal pins a and b of (33th pair represent respectively the positive and fit between the operative and v quired teasers" negative; elements of a signal and each pin has two lateral positions, one operative (see Fig. 9) and the other inoperative (see Fig. The two pins (1 and b in each set are partly embraced, inside the link carrying them, by a'bent spring metal plate is that serves to hold each pin frictionally in each endways position into which it is moved.

' The signal pins-are operated by tappers m,

1 and 2) -in the form of lever arms n (Figs.

respectively, and posipivoted at m and n .tively moved at the required times into the inoperative position by rods o and 7? respectively which are jointed to other arms m n. connected to the tapper arms, the said rods being operated at the re;

times by the rotary double cam device 1' of a Creed receiver constructed and operated substantially as described in the specification of .thesaid former British Letters Patent .No. 165820.' The said rods 0 and p replace the-punches used in that apparatus and the toothed wheel d for driving the endless chain c carrying the signal wheel of such apparatus'and has combined ins a and b, takes the place of the tape feed therewith the correetor wheels (1 d and correetorrods 8, 8 of the said Creed receiver. The tappers mend a may, as shown, be arranged at opposite sides of the chain 0 so that one of them, say m, will move the pins a representing positive signals, laterally in one direction from the position shown.- in Fig. 9 to tapper n will move the other pins'b, representing negative signals, laterally in the opposite direction from the position shown in Fig. 9 to that shown in Fig. 10'. Both-sets of signal pins a and b can be restored to their normal positions by stationary cams t and 19 (see Fig. 6) between. which. ithe.pin chain 0 graphic line signals in a manner well underthe slide bar'having two diametrically arranged detents so thatthe spindle w makes stood,

one half of a revolution each time it is released. j

The re-transmitting portion of the apparatus comprises, in addition to the toothed wheel h around which the pin chain 0 passes, as h-ereinbefore described, two spring controlled levers 1-1 and 2--2' arranged parallel to one another. One arm, namely, 1 or that shown in Fig. '10 and the other 2 of each lever, carries a contact 3 or 4' adapt edto co-act with astationary but adjustable contact 3 or 4 and. the other armll 'ior 2 is wardly extending arms '1 and 2 are arranged to move in an approximately radial dlrectlon with reference tothe axis of the advance of the other. To enahlethe said downwardly extendings arms 1", 2 to yield, should they be acted upon sideways for any reason, by the signal pins a-Zg, each arm is jointed to its lever 11 or 2+2 and normally held in position by a spring 4 (Fig. 12). Associated with the two levers 11 and 2'2 and arranged between downwardly and upwardly extending bent parts 1, 2? (Fig. -5) connected to them, is a vertically oscillating device, shown as a flat plate 5, operated by a lever 6 connected to a rotary crank pin 7, or eccentric, on the end of the toothed wheel h, one arm being vslightly in shaft g. 8 is a spring connected to the arm 1 I of lever 1-1 and 9 is a spring connected to moved upward,-the arm 2 of lever 2-42 carrying the downwardly extending arm 2 with lateral pin 2 will'be raised by the action of its spring 9, and when the oscillating device 5 moves downward, the'arm 1 0i lever 1-1 with the downwardly extending arm 1 will be moved downwardlyby the action of'its spring 8.

If a signal lever 11=* or 22 has been displaced endways by its tapper m or a, the arms 1, 1 or the arms 2*, 2 of the lqer, when released, will, by the spring 8 or 9, be'caused to pass the end of the displaced pin to a suflieient pin a or 1) corresponding to extent to enable the lever to close the circuitof the second line or section of line through the contact 3, 3 or 4, 4 and transmit to the second line either a positive or a negative current corresponding to the original positive or negative signal received.

For enabling the speed of the electric motor u used for rotating the main driving spindle g and the toothed wheels d and 71/ around which the endless pin chain 0 passes, to be varied from time to time to maintain synchronism between the speed of the motor and the speed of the received signals, there may be employed a circuit making and breaking device comprising a wheel 10, operated by the rising or falling of the lower portion of the chain 0 between thetwo toothed wheels d and h, and electric contacts 11, 11 controlled by the said wheel, the device actingvto vary or control the speed of the said electric motor, as required. In the example shown in Fig. 1, the electric motor 10 has a shunt field winding 12 in series with which is a resistance winding 13. 14 and 15 are spring blades carrying the contacts 11, 11 respectively which are normally held apart when the speed of the motor is normal but when the speed rises above the normal and the wheel 11, feeds the chain 0 too fast, the wheel 10 will be moved downward by its spring 16 and bring the two spring blade contacts 11-11 together so as to short circuit the resistance winding 13 and thereby reduce the speed of the motor a.

If desired the two tappers m and a may bearranged at the same side of the chain and the endways position ,of the pins modified accordingly.

Figs. 13 to 1T inclusive, show a modified construction of chain wherein each of the loop shaped links 0 is straight, instead of being of L shape, and is provided with two pin holes only, each provided with an endways movable signal pin a the pin carried by one link serving to joint that link to the next adjacent link. The chain therefore carries only one row of parallel signal pins, instead of two rows of parallel signal pins as in Figs. 7 to 11 inclusive. This modified form of pin chain can be used in telegraphic receiving and re-transmitting apparatus of the kind hereinbefore described with reference to Figs. 1 to 12 for setting the signal pins in accordance with signals transmitted according to the IVlieatstone-Morse code.

In this case however the tapper m 0 erated by say positive signals, is cause to move alternate signal pins a say the odd numbered pins 1, 3,5 and so on, endways in one direction from a middle position shown in Fig. 15, to one side of the chainas shown in ig. 16. so as to permit the corresponding signal transmitting lever 1, 1" to make its effective strokes for retransmitting the positive signals. Also,- the tappera, operated by say negative signals, is caused to movethe other alternate signal pins a numbered 2, 4, 6 and so on endways in the opposite direction from their middle position as shown in Fig. 15, to the opposite side of the chain as shown in Fig. 17, so as to pcrmit the corresponding signal transinitting lever 2, 2 to make its efl'ective strokes for retransmitting' the negative signals. I

\Vhen working on the \VhcatstoneMorse code, whether using a chain according to Figs. 7 to 11 or to Figs. 13, 11- and 15, one of the connecting wheels (1, (Z is adapted for use with signal pins corrcspondingto positive signals and the other for use w th signal pins corresponding to negative signals.

A signal pin chain having a single row of signal pins as in Figs. 13 to 17 inclusive can also be used for the retransmission of signals, when working with the five unit or other, multiple unit code; In this case each signalpin has only two positions, all of them normally extending from one side of the chain, as shown in Fig. 15), so that they are normally in positionfor the retransmissio'n ofsignals of one polarity, conveniently negative signals. In this case only one tappcr, say 121, corresponding to positive signals, for displacing signal pins endways to the opposite side of the chain as shown in Fig. 20 to permit of the retransmission of po':itive signals, is necessary. The chain may be used in apparatus such as shown in Figs. 1 to '6 inclusive but, as stated, only one tappe'r say at is necessary only one correction wheel (5 or d and only one correcting rod .9 or s are neceJSary. Also,.the cam spindle w is released only on the receipt of positive signals and is then caused to make a complete revolution in known way, or a succession of complete revolutions, if a number of positi e signals are received in succesion and being arrested on the receipt of a negative signal. Also the circuit controlling levers 11 and 22 and the means (Fig; 5) used for controlling such levers, are modified as shown in Fig. 18, to admit of the lever-arms 1" ward together towards the pin chain, when the movable member 5 moves downward.

The pin chain shown in Figs. 7 to 11 inclusive and also that shown. in Figs. 13 to 17 inclusive, canalso be used in telegraph 'receivingapparatus designed to be worked by signals transmitted according to the cable-code, for instance in telegraphic receiving apparatus of the kind described and shown in the specification of British Letters Patent No. 204,398 hereinbefore referred to. In this case, such receiving apparatus is modified by substituting for the tape feeding wheel a. of that apparatus, a

toothed wheel like (Z shown in Figs. 1, 2

and 3 hereinbefore described and the punches g and it or the former arrangement are replaced as shown in the accompanying Fi 21, by members 17 and 18 that are notched at their rear ends like the punches of the former arrangement and are jointed to lever arms 19 and 20 pivoted at 21 and 22 and provided with signal pin tappers m and 71 between which the signal pin chain moves as in the arrangement shown in Figs. 1, 2 and 3. Each notched member, 17, 18 is moved forward by a tI'UHHVOlC'OlV movable seleeior pin 23 carried by :1 reciprocation; bar .Zaoperated by rotary can! mechanism under the control of a relay responsive to both positive and negative signals, the said selector pin 23 being moved trans- Ill) 7 positive signal, 'the corresponding tapper signal pin versely into one extreme position by a link operated by the armature of arelay when positive signals are received and into its other extreme position when negative signals are received, as describedin the specification of the said former British Letters Patent No. 204,398. As will be understood, when the selector pin 23 is moved into one extreme position and the reciprocating bar24: moves forward, owing say to the reception of a say m, will move the, corresponding signal pin a endways in one direction, and successive signalpins a will be moved endways in the same direction so long as positive signals are beingreceived. Vhen however a negative signal is received, the selector pin 23 will be movedftransversely into ltS opposite extreme position in the reciprocating bar 24 by the last mentioned relay and the tapper 71/ will be actuated to move the 01 then in position, in the opposite direction, successive signal pins being moved in the same direction, so long as negative "signals are being received. In this case also the circuit controlling levers 1-' 1 and 2-2 and the means for controlling such levers are modified, as shown in Fig. 18, to admit of the lever arms 1 and 2 moving downward together towards the pin chain. 7.

As will be obvious, the details of constrfi tion of apparatus according to the invention said shaft at a predetermined substantiallycan be variously modified tosuit requirements. I v

What I claim is 2- 1. In apparatus for the automatic reception and retransmission of electric signals, a telegra hic receiver comprising a pin 'wheel, adriving shaft, means for rotating constant speed, a yielding driving connec- "tion between said pin wheel and shaft,

means for adjusting saidpin wheel in a 1 passes,

rotary sense when this may become necesiflary, an endless chain passmgiaronnd and riven by said pm wheel, signal pins movable transversely in said chain, means for agljustirig the relative endways position ofid pins in said chain to correspond to received signals, means for returning dislaced signal pins to normal position after eing used, mechanismthe pin wheel. adjusting means and the means used for adjusting the .endways posi- ,tion of said signal pins and means under the control of electric signals to be received an retransmitted, adapted on receipt of a signal to bring said mechanism into operation at the required times to actuate the means and the signal pin adjusting means, and a signal repeater comprising a wheel around .{hich said chain aforesaid drivin same speed as the shaft and circuit controlling mechanism' ependadapted to actuatemeans for driving said wheel at the em for operation on the endways position the automatic recepwheel and adjust the pin wheel in a rotary sense when this may become necessary, an

endless chain passing around and driven by said pin wheel, signal, pins carried by said chain and movable transversely therein, a tapper for moving said pins endways insaid chain to correspond to received signals, means for returning displaced pins to nor-. mal position after use, and mechanism under the control of the signals to be re.- ceived and retransmitted, adapted to actuate the said correcting rod and tapper at the correct times, and a signal repeater comprising a wheel around which said chain passes, means for driving said wheel at the same speed as said driving shaft, and circuit controlling mechanism de endent for operation upon the relative en ways position 'of the signal ins in the chain.

3; In apparatus or the automatic reception and retransmission of electric signals,

a telegraphic receiver comprlsing a pin Wheel, 3.=dI1ViIlg shaft, means for rotating said shaft at a predetermined substantially constant speed, a yielding driving connection between said pin wheel and shaft, correcting Ineans'for adjusting said pin wheel in a rotary sense when this may become necessary, an endless chain passing around and drivenby said pin wheel, signal pins movable transversely in said chain, means for adjusting the relative endways positions of said pins in said chain to correspond to received signals, means for returning displaced signal pins to normal position, rotary cams adapted when operated, to actuate the correcting means and the 'pin adjusting means, driving means arranged to operate continuously, a yielding connection between said cams and driving means, escapement mechanism one member of which is connected to the cams and a second member of which normally holds the first member and a signal repeater comprising a whee around which saidchain passes, means for driving said wheel at substantially the same speed as the aforesaid driving shaft and signal repeating mechanism controlled by the endways position of the signal pins in the chain.

4. In apparatus for receiving and re-transmitting electric signals, a telegraphic receiver comprising a pin wheel, a driving shaft means for rotating said shaft at a predetermined substantially constant speed, a yielding clutch between said pin wheel and shaft, a correcting wheel connected to said pin wheel, a correcting rod adapted when moved forward to engage said toothed wheel and adjust it and said pin wheel in a rotary sense when this may become necessary, an endless chain passing around airl driven by said pin wheel, signal pins carried by said chain and movable transversely therein, a tappcr adapted to move said signal pins endways in said chain from normal position into signal re-transmitting positions, a rod for moving said tapper into its operative and inoperative positions, means for returning displaced pins after use to normal position, a double rotary cam device for moving said correcting rod and tapper operating rod into their operative positions at the required times and afterwards rcturning them to normal position, driving mechanism adapted to run continuously, a yielding clutch between said cam device and driving mechanism, an escapement one member of which is connected to said cam device and a second member of which normally holds the first member and cam device stationary, and a relay responsive to signals to be received and re-transmitted, adapted on receipt of a signal to cause the second member of the escapement to release the first membe and cam device and permit the cam device to be rotated by the driving mechanism and a signal repeater comprising a wheel :around which said chain passes, means for driving said wheel at the same speed as the aforesaid driving shaft and circuit controlling mechanism dependent for operation on the endways position of the signal pins in said chain.

5. In apparatus for receiving and retransmitting electric signals, a telegraphic receiver comprising a pin wheel, a driving shaft, means for rotating said shaft. at a predetermined substantially constant speed, a yielding clutch between said pin wheel and shaft. correcting wheels connected to said pin wheel. independent correcting rods adapted when moved forward to engage said correcting wheels and adjust them and said pin wheel in a rotary sense when this may become necessary, an endless chain passing around and driven by said pin Wheel, signal pins carried by said chain and movable transversely therein, two tappers one adapt ed to move the signal pins in one direction from their normal position and the other to move said signal pins in the opposite direction from their normal positions, in-

to release the first member and cam dependent rods for actuating said tappers, means for returning displaced signal pins after use to normal positions, a double rotary cam device adapted when moved through one half a revolution to move one correcting rod and tapper operating rod into their operative positions and then return these rods to their normal position and upon the next half revolution to move the other correcting rod and tappcr operating rod into their operative positions and then return these rods to their normal position, driving mechanism adapted to run continuously, a yielding clutch between said cum device and driving mechanism, and escapement one member of which is connected to said cam device and a second member of which normally holds the first member and cam device stationary, and a relay responsive to signals to be received and re-transmitted, adapted on receipt of a signal to cause the second member of the escapement device and permit the cam device to be rotated by the driving mechanism through half a revolution and then to re-arrcst said first escapement member and cam device, and a si :11- repeater comprising a wheel around w ich said chain passes, means for driving said wheel at the same speed as the aforesaid driving shaft, and circuit controlling meclr anism dependent for operation on the endways position of the signal pins in said chain.

6. In apparatus for the automatic reception and re-transmission of electric signals, a telegraphic receiver comprising a pin wheel, a driving shaft, means for driving said shaft. at a predetermined substantially constant speed, a yielding clutch between said pin wheel and shaft, means for adjusting the pin wheel in a rotary senseavhen this may become necessary. an endless chain passing around and driven by said pin wheel, signal pins movable transversely in said chain, means for adjusting the relative endways position of said signal pins in said chain to positions corresponding to the sig' nals received, electro-mechanically operated means adapted. on'the receipt of a signal, to move said pin wheel adjusting means and the means used for adjusting the endways position of the signal pins and then to return said means to normal position and means for returning displaced signal pins to normal position after use, and a signal repeater comprising a wheel around which said chain passes. means for rotating said wheel at substantially the same speed as said driving shaft and circuit controlling mechanism adapted to re-transmit received signals and dependent for operation or non-operation upon the absence or presence of signal pins in its path of movement.

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7. In apparatus for the automatic reception and re-transmission of electric signals, a telegraphic receiver comprising a pin wheel, means for rotating the same, an end-. less chainpassing around and driven by said pin Wheel,'signal pins arranged transversesignal pins,

ly to and carried by said chain, means adapted on the receipt of electrical signals, to displace signal pins endways in said chain to positions. corresponding to the signals received, means for restoring displaced signal pins to their "normal position after use and a signal repeater comprising a wheel around which said chain passes, meansfor rotating saidtoothed' wheel at the same speed as the means used for rotating the pin wheel, and circuit controlling mechanism for re-transmitting signals corresponding to the received signals, said circuit controlling mechanism comprising levc rs', circuit connections controlled by movement of said levers for re transmitting received signals, abutment de-' vices arranged to be moved towards and fromsaid signal ins by-said levers, and means for oscillating said levers, the full movement of each lever being dependent upon the absence of a signal pin in the path of the corresponding. abutment device.

' 8. For the automatic reception and retransmission of electric si als, apparatus according to claim 7 ,in which the abutment device of each circuit controlling lever is pivoted to such lever and is held in its normal position by a spring adapted to enable it to be moved laterally when required.

9. Incombined signal receiving and reeating apparatus, an endless chain, means or causing endways movement of saidchain,

signal pins mounted to move endways in a transverse direction in said chain, means 'for causing. relative endways movement of sald signal pms in accordance with receivedsignals andcircuit controlling means for repeating said signals, said circuit controlling means comprising abutment devices adapted to move towards and from said means adapted to move said abutment devices towards and from said signal pins and to be arrested in one direction by signal pins in normal positions and c1r- I edit connections'under the control of the means used for moving the abutment devices. 10, In combined signal receiving and 're- .peating apparatus, an endless chain, means for causing endways movement of said eham, signal pms mounted. to move endways in a transverse direction in said chain, means for causing relative endways movement of said signal pms 1n accordance with received signals and .clrcmt controlling means for repeatingsaid signals, said circuit controlling means comprising two abutmentdevices arranged to move towards and from said signal pins, two spring controlled levers adaptedto move said abutment devices to their full operati 'for causing endways movement extent in the absence of signal pins in their path and circuit connections under the control of said levers.

11. In combined signal receiving and repeating apparatus, an endless chain, means for causing endways movement of said chain,- signalpins mounted to move endwaysin a transverse direction in said chain, (means forcausing relative endways movement of said signal pins in" accordance with received signals and circuit controlling means for repeating said signals, said circuit controlling means comprising two abutment devices arranged to move in directions at right angles to the length of the signal pins and across the ends of displaced pins,'means for moving said abutment devices toward and from said signal pins, means adapted afterwardsto move the abutment devices away from said signal pins and circuit connections 7 under the. control of the means used for 7 said signal pins in accordance with receivedsignals and circuit controlling means 'for re-' 1 peating said signals, said circuit controlling means comprises two independent levers, two separate abutment devices connected each to one :end of one of said levers and arranged to move in a direction at right angles to the axis of each signal pin, springs each adapted to actuate one of said levers to move the associated abutment device towardsasigiial pin, means adapted .to release each lever and permit it and its abutment J device to be moved by its spring. in the operative direction and afterwards to move said lever and abutment device into their inoperatlve positlons, each lever-making a full ve movement only when there is no' slgnal pin in the path of'its abutment device and circuit closing means under the control ofsaid levers and adapted to close a circuit only when one or other lever makes 1ts full operativelmovement.

13. In combined signal rece1ving-andrean endless chain, means peating apparatus,

of said chain, signal pins mounted to move endways i-na transverse direction in said chain,

' mean i for causing relative end-ways movement of said signal pms 1n accordance vvlthi received slgnals' and clrcu-it controlllng means forrepeating said signals, said circuit controlling means comprising two mdepend ent levers, two separate abutment devices levers and arranged to 'move in a direction at right angles to the axis-of eachsignal connected each to one end of one of said,

rad

pin, springs each adapted to actuate one of said levers to move the associated abutment device towards a signal pin, said levers being each provided with an extension, an

oscillating device driven from the repeater and adapted to move from and towards each extension and permit the corresponding lever and abutment device to be moved in the operative direction by its spring and to positively move such parts into their inoperative position against the action of the asso ciated spring, each lever making a full operative movement only when there is no signal pin in the path of its abutment device and circuit closing means under the control ofsaid levers and adapted to close a circuit only when one or other lever makes its full operative movement.

14. In combined signal receiving and re- 0 peating apparatus, an endless chain, means for causing endways movement of said chain, signal pins mounted to move endways in a transverse direction in said chain, means for causing relative endways movement of said signal pins in accordance with received signals and circuit controlling means for repeating saidsignals, said circuit controlling means comprising two independent rocking spring controlled levers, abutment devices carried by said levers, and arranged to move in a direction at right angles to the axis of each signal pin, one abutment device terminating above the path of the pins and the other having an inturned extension terminat-ing below the path of the pins, a spring connected to one lever and adapted to depress the abutment device terminating above a signal pin, a spring connected to the other lever and adapted to raise the abutment device having an extension below a signal pin, means for releasing the levers alternately to permit them to be moved by-their springs in the operative direction and for moving them alternately against the action of their springs to normal position, each lever making a full operative movement only when there is no signal pin in the path of its abutment device, and circuit closing means under the control of said levers and adapted to close a circuit only when one or other lever makes its full operative movement.

15. For a combined si nal receiving and repeating apparatus, a signal pin carrying chain comprising links of loop shape as seen in plan, the free end portions of each link being inset and fitted within and between the connected end portions of the link and endwa vs movable signal pins extending through the overlapping end portions of adjacent links so as to joint said links together.

16. For a combined signal receiving and repeating apparatus. a signal pin carrying chain comprising links of loop shape as seen in plan, the free end portions of each link being inset and fitted within and between the connected end portions of the next link, endwa vs movable signal pins extending through the overlapping end portions of adjacent links so as to joint said links together, and

bent spring plates acting to hold said signal pins irictionally in an endways direction.

17. For combined signal receiving and repeating apparatus a signal pin -arr ving chain comprising links each consisting of of two L-shaped side parts the vertical members of which are connected together at the top and the horizontal members of which are inset at their free ends and titted between the side parts of the next adjacent link, the vertical members of each link having superposed holes therein and the free end portions of the horizontal members having single holes therein to align with the lower holes ot-the pairs of holes in the vertical members of an adjacent link and pairs of superposed signal pins extending through and endwa vs movable in the superposed holes in the vertical members of each link, the lower pin o t each pair also extending through the holes in the inset free ends of the horizontal members of the next adjacent link.

FREDERICK GEORGE CREEI).

ill) 

